People are only measuring social division in the online discourse imo. Look at the world. People are lining up politely in the grocery store and smiling when you cross paths on the street. I'm guessing you will also note there is no social division in your neighborhood either when you go out walking around.
Meanwhile, in the 1960s people were burning their draft cards, starving themselves to be underweight for the draft, or fleeing to canada. Returning soldiers at the airport would be spat on by protesters. Black people regularly had stones thrown at them or worse and no one made any news article about it. Activist groups were actually armed, and serious situations occured with that. Teenage girls were congregating in a canyon outside of los angeles to join a serial killers sex cult. Groups of people were travelling the country in a school bus turning square people on to acid and mushrooms. That was the peak of social disorder.
We are all in line now, despite what the narratives in the media make us think. People hold opinions strongly, but they are of a limited set of prescribed opinions from the media. Find any thread online about a given topic you've read about online before, and the comments will all be the same and predictable. We aren't exposed to as much unorthodox thought as our population used to be back before global media had total influence on how we sourced our information about the world.